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This patch allows the PL/Python module to do (SRF) functions.

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The patch was taken from the CVS version.

I have modified the plpython.c file and have added a test sql script for
testing the functionality. It was actually the script that was in the
8.0.3 version but have since been removed.

In order to signal the end of a set, the called python function must
simply return plpy.EndOfSet and the set would be returned.

Gerrit van Dyk
This commit is contained in:
Bruce Momjian 2005-07-04 19:03:30 +00:00
parent 109f079be6
commit af8756713f
2 changed files with 28 additions and 1 deletions
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17
src/pl/plpython/plpython.c
View File

@ -29,7 +29,7 @@
* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/pl/plpython/plpython.c,v 1.62 2005/05/06 17:24:55 tgl Exp $
* $PostgreSQL: pgsql/src/pl/plpython/plpython.c,v 1.63 2005/07/04 18:59:42 momjian Exp $
*
*********************************************************************
*/
@ -286,6 +286,9 @@ static PyObject *PLy_exc_error = NULL;
static PyObject *PLy_exc_fatal = NULL;
static PyObject *PLy_exc_spi_error = NULL;
/* End-of-set Indication */
static PyObject *PLy_endofset = NULL;
/* some globals for the python module
*/
static char PLy_plan_doc[] = {
@ -770,6 +773,16 @@ PLy_function_handler(FunctionCallInfo fcinfo, PLyProcedure * proc)
fcinfo->isnull = true;
rv = (Datum) NULL;
}
/* test for end-of-set condition */
else if (fcinfo->flinfo->fn_retset && plrv == PLy_endofset)
{
ReturnSetInfo *rsi;
fcinfo->isnull = true;
rv = (Datum)NULL;
rsi = (ReturnSetInfo *)fcinfo->resultinfo;
rsi->isDone = ExprEndResult;
}
else
{
fcinfo->isnull = false;
@ -2317,9 +2330,11 @@ PLy_init_plpy(void)
PLy_exc_error = PyErr_NewException("plpy.Error", NULL, NULL);
PLy_exc_fatal = PyErr_NewException("plpy.Fatal", NULL, NULL);
PLy_exc_spi_error = PyErr_NewException("plpy.SPIError", NULL, NULL);
PLy_endofset = PyErr_NewException("plpy.EndOfSet",NULL,NULL);
PyDict_SetItemString(plpy_dict, "Error", PLy_exc_error);
PyDict_SetItemString(plpy_dict, "Fatal", PLy_exc_fatal);
PyDict_SetItemString(plpy_dict, "SPIError", PLy_exc_spi_error);
PyDict_SetItemString(plpy_dict, "EndOfSet", PLy_endofset);
/*
* initialize main module, and add plpy

12
src/pl/plpython/sql/plpython_setof.sql Normal file
View File

@ -0,0 +1,12 @@
CREATE or replace FUNCTION test_setof() returns setof text
AS
'if GD.has_key("calls"):
GD["calls"] = GD["calls"] + 1
if GD["calls"] > 2:
del GD["calls"]
return plpy.EndOfSet
else:
GD["calls"] = 1
return str(GD["calls"])'
LANGUAGE plpythonu;